Horse Power Question

[Boozy Creek Beast]

I have a 1980 GS1100E with an 1166 Big Bore Kit, Stage 3 Jet Kit, and a V and H Megaphone header. My question is: Has any one ran this configuration across a Dyno? I am unable to find a shop with a Dyno to test my results. I would like to find out if anyone has ran this configuration and what kind of results these Mods produced! I am sure that I will be happy with the result but since I am still looking for a shop with a Dyno that can help me get the best results. It would be nice to know what results of other GS1100's have obtained!!!!!

Horse Power: ?
Compression Ratio: ?

Thanks,
The Beast

[firemun59]

I have a 1980 GS1100E with an 1166 Big Bore Kit, Stage 3 Jet Kit, and a V and H Megaphone header. My question is: Has any one ran this configuration across a Dyno? I am unable to find a shop with a Dyno to test my results. I would like to find out if anyone has ran this configuration and what kind of results these Mods produced! I am sure that I will be happy with the result but since I am still looking for a shop with a Dyno that can help me get the best results. It would be nice to know what results of other GS1100's have obtained!!!!!

Horse Power: ?
Compression Ratio: ?

Thanks,
The Beast

My guess would be about 115-120 at the crank

[rosco15]

Wiseco 10.5-1 1166 pistons, stock head with no porting, stock cams. I was running Star dragpipe, msd and dyna s ignition, and 36 Mikuni carbs.

[80GS1000]

Wiseco 10.5-1 1166 pistons, stock head with no porting, stock cams. I was running Star dragpipe, msd and dyna s ignition, and 36 Mikuni carbs.

Wow, those are great numbers. You're making more peak torque at lower RPMs than a newer GSXR 1000!

[Tarbash 27]

Are you sure that torque reading is right, if it is than you have more torque than my truck with a 3 liter v6. It just seems way above the first run.

[rosco15]

The 181.7 is wrong. I'm not sure why it printed it out like that. The torque was around 87. Peak HP was 128.

[80GS1000]

Still more torque than newschool sportbikes. That thing must accelerate like a beast!

[Jethro]

The 181.7 is wrong. I'm not sure why it printed it out like that. The torque was around 87. Peak HP was 128.

Whew, thanks for clairifying that! I didn't know what was going on.

Still, great numbers, especially if you lightend the bike up a bit somehow.

[Nicholaschase29]

I usually drain the oil to save a few pounds :-D

[Mike McNaney]

I'll bet that with a good cam and an ignition advance curve to match, 150hp is right in line.
Cross my fingers. Thats what Im shooting for.

[RifRafRacing]

hosepepper

My 498 lb 81 1166 10.25-1 ran low 9.8's @ 138mph with stock head,g3 cams,38mm flatslides,stock ignition,and V&H dragpipe,oh yeah on a crappy dunlop street tire.These engines make healthy low/midrange grunt,thats what makes them a good choice for hopped up street rides.

[scotty]

Hey Rosco. What are you running for a rear tire????? BTW Nice numbers.

My 1166 would make your insides wiggle too. It is a great combo you have. Lots of folks really under estimate what these old gs bikes can put out.:-D

[rosco15]

It's a dragbike so I'm running a M/T slick.

[scotty]

It's a dragbike so I'm running a M/T slick.

I was asking because as i get acustomed to my new engine, I dont believe my narrow one sized over tire will do the job. I ride it only on the street. I really dont know what to do in the way of a stretch and wider tire and still have the bike handle properly.

[RifRafRacing]

early 90's gsxr wheels are very cheap on ebay lately,a 5.5" wide rim with a 180 tire would be a good choice.